java print out class statement

Question

i am new to java and i have a simple question and i have this code

public abstract class Seq { int a, b, c;}

class For extends Seq{
public For( int first, int last, int step )
{
a=first;
b=last;
c=step;
}

and in the main i have:

For r1= new For(3, 4, 5);

what i want to do is that i want to add this statement in the main System.out.print(r1); and i want this statement to print "your parameters: 3, 4, 5"

how can i do this?

I would take a read through [How to use the toString method in Java?](http://stackoverflow.com/questions/3615721/how-to-use-the-tostring-method-in-java) — MadProgrammer, Nov 13 '12 at 04:42

score 4 · Answer 1 · answered Nov 13 '12 at 04:41

4

Add a toString method in For as:

@Override
public String toString(){
    return "your parameters: "+ a + ", "+ b+ ", "+c;
}

answered Nov 13 '12 at 04:41

Yogendra Singh

33,197
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@user1763553: You need to accept the answers, if you like them. – Yogendra Singh Nov 13 '12 at 04:49

score 2 · Answer 2 · answered Nov 13 '12 at 04:42

2

You can do this by implementing the For class' toString method:

public String toString ( )
{
    return "your parameters: " + a + ", " + b + ", " + c;
}

answered Nov 13 '12 at 04:42

Mac

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score 0 · Answer 3 · answered Nov 13 '12 at 04:42

You would have to override the toString() method and create another one that prints out the contents of r1.

@Override
public String toString(){
    return a + ", " + b + ", " + c;
}

Then it is simply:

System.out.println("Your parameters: " + r1.toString());

score 0 · Accepted Answer · answered Nov 13 '12 at 04:56

From Java Doc for String

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

So if you want to your representation for For object then you have to override toString() in your class Like folowing :

class For extends Seq{
  public For( int first, int last, int step )
   {
     a=first;
     b=last;
     c=step;
   }
 @Override
 public String toString(){
    return "your parameters: "+ a + ", "+ b+ ", "+c;
 }
}

score 0 · Answer 5 · answered Feb 07 '14 at 01:45

0

Make a public string that returns

return a + ", " + b + ", " + c;

answered Feb 07 '14 at 01:45

MrAwesome8

269
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java print out class statement

5 Answers5